Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucsd!swrinde!kent From: kent@swrinde.nde.swri.edu (Kent D. Polk) Newsgroups: comp.sys.amiga.tech Subject: Re: DNet running under Sun OS 3.5 Message-ID: <26362@swrinde.nde.swri.edu> Date: 31 May 90 02:21:13 GMT References: <981@tau.sm.luth.se> Reply-To: kent@swrinde.UUCP (Kent D. Polk) Organization: Southwest Research Institute, San Antonio, Texas Lines: 32 In article dillon@overload.UUCP (Matthew Dillon) writes: >>In article <981@tau.sm.luth.se> d88-mbe@sm.luth.se (Michael Bergman) writes: >> >>Now for my question: >>I have read articles here (or in c.s.a.) saying that some of you use >>38400 bps between Sun and Amiga using a terminal program (JRComm > > I advise not to run DNet faster than 19.2KBaud on the built in serial > port simply because a standard Amiga cannot receive faster without loosing > data... you wind up going slower due to packet errors. That's all. Since > both DNet and terminal programs use the serial.device one assumes the > same problem would occur with the terminal programs. While a 68000 Amiga may have trouble, 68020/68030 Amigas don't. Dnet can send & receive at 38400 with no trouble at all with such. > UNIX systems tend to barf on serial at high data rates. Generally, the > kernel buffer (usually 256 bytes) will get full before the user task > has a chance to drain it with read(), causing lost data. The problem can > normally be avoided by using a 7-wire (e.g. RTS/CTS) interface which is > certainly possible if you are directly connected. No disagreement here. I have two Amiga's hooked to a Sun 3/260 which can handle 38400 reception most of the time with only Xon/Xoff. I would like to try RTS/CTS, but have never gotten any Dnet past 2.01 to completely work (2.01 doesn't support RTS/CTS) and haven't had the time to try anything but trivial debugging, so ... ==================================================================== Kent Polk - Southwest Research Institute - kent@swrinde.nde.swri.edu "Anything worth doing is worth overdoing" ( :^) ) ====================================================================